[Freeswitch-dev] Newbie Q

Wed Nov 2 18:09:31 MSK 2011

Before you go the route of hacking modules be sure to examine the extensive
list of dialplan tools and FS cmd line APIs. Personally, I would experiment
with the sched_api and uuid_broadcast API's. You could create a generic
dialplan extension and then have the sched_api perform a uuid_broadcast
that does an execute_extension on the uuid of the call leg. The (generic)
extension you execute can stop the current recording, start up a new
recording, and schedule another uuid_broadcast for 30 seconds later.

It should be a fun exercise! :)

-MC

On Wed, Nov 2, 2011 at 7:56 AM, P. Broennimann <peter at enovatiq.com> wrote:

> Thx Eliot 4 ur answer
>
> Unfortunately post-processing in not an option -> This needs to happen
> on-the-fly.
>
> I am not scared of work and I have time so I will dig deep
> and try to figure out how to write/modify FreeSwitch C modules...
>
> Thanks & cheers,
> P.
>
>
>
>
> 2011/11/2 Eliot Gable <egable+freeswitch at gmail.com>
>
>> Maybe just record the entire call and then split it up afterwards using a
>> wav-file post-processing program. Maybe sox or ffmpeg or something similar
>> might work? Alternatively, you could use the API in FreeSWITCH to start and
>> stop and start and stop the recording every 30 seconds, but that seems like
>> overkill and lots of extra work compared to just using post-processing
>> software. Plus, you'll miss bits of the recording between when you stop one
>> segment and start the next. Is there some reason you need to be doing this
>> on the fly versus post-processing? Alternatively, you could write a module
>> in C for FreeSWITCH which taps the audio and you could buffer it internally
>> in your module and then save out 30-second segments. This would let you get
>> all of the audio with micro-second precision splits so you wouldn't loose
>> any audio between segments, but it's an awful lot of work to go through
>> compared to post-processing.
>>
>>
>> On Tue, Nov 1, 2011 at 6:50 PM, P. Broennimann <peter at enovatiq.com>wrote:
>>
>>> Hi Michael
>>>
>>> Thx for answering. Sorry next time I'll post on the other list...
>>>
>>> Basically I am looking for a solution to split "on-the-fly" recordings
>>> on answer. The result for each call should be a consecutive/sequential set
>>> of wav files of each X seconds (saved on-the-fly in a specific directory
>>> and using a specific filename stucture)...
>>>
>>> I don't want to reinvent the wheel so that's why I asked if something
>>> similar already exists. Performance is quiet important here (small latency).
>>>
>>> P.S: I bought the FreeSwitch book and I am making progress learning :)
>>>
>>> Thx & cheers,
>>> P.
>>>
>>>
>>> 2011/11/1 Michael Collins <msc at freeswitch.org>
>>>
>>>> Welcome to FreeSWITCH!
>>>>
>>>> First off, let me just mention that this question is probably better
>>>> suited to our -users list. (This is the -dev list which has a smaller
>>>> audience and is reserved for more intense discussions.) If you don't get a
>>>> satisfactory answer here then re-post on freeswitch-users list.
>>>>
>>>> Now, as far as your question goes... you have different options
>>>> available to you but it really depends on how you are generating your
>>>> calls. Also, do you want the call to last more than 30 seconds and have
>>>> only the recording be 30 seconds? Do you want recording to start on early
>>>> media or on answer?
>>>>
>>>> As an example of how to do a simple 30-second recording here's one that
>>>> when you call it, it will start recording, play music for 30 sec, then end
>>>> the recording and disconnect:
>>>>
>>>> <extension name="record 30 sec of MOH">
>>>>   <condition field="destination_number" expression="^732664$">
>>>>     <action application="answer"/>
>>>>     <action application="record_session"
>>>> data="$${recordings_dir}/${uuid}.wav"/>
>>>>     <action application="sched_hangup" data="+30"/>
>>>>     <action application="playback" data="${hold_music}"/>
>>>>   </condition>
>>>> </extension>
>>>>
>>>> Dial 732664 (i.e. "REC MOH" :) and just wait. You'll hear music and
>>>> then at 30 seconds it will stop recording.
>>>>
>>>> Happy FreeSWITCHing!
>>>>
>>>> -MC
>>>>
>>>> On Tue, Nov 1, 2011 at 1:27 PM, P. Broennimann <peter at enovatiq.com>wrote:
>>>>
>>>>> Hi there
>>>>>
>>>>> I am new to FreeSwitch and I have a question...
>>>>>
>>>>> I'd like to record a call/session outputing same length .wav files
>>>>> (all .wav files to be exactly 30 seconds long).
>>>>>
>>>>> I browsed through the FreeSwitch sources from GIT and I found the
>>>>> module 'mod_snapshot'. Would this module be the best start/base for the
>>>>> functionality I am looking for resp. are there other modules/scripts that I
>>>>> should better check first?
>>>>>
>>>>> -> I tried to build the module in MSVC Express 2010 but I get errors
>>>>> -> Anyone was recently successful building it?
>>>>>
>>>>> Thx in advance,
>>>>> P.
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>
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>>>
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>>
>>
>> --
>> Eliot Gable
>>
>> "We do not inherit the Earth from our ancestors: we borrow it from our
>> children." ~David Brower
>>
>> "I decided the words were too conservative for me. We're not borrowing
>> from our children, we're stealing from them--and it's not even considered
>> to be a crime." ~David Brower
>>
>> "Esse oportet ut vivas, non vivere ut edas." (Thou shouldst eat to live;
>> not live to eat.) ~Marcus Tullius Cicero
>>
>> _______________________________________________
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>>
>
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